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Cornerstone · Grades 3–5 Keystones #1 4 April 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 4 April 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 7x + 15 = 78

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 15cm

    Answer: 18.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 60 in the ratio 1:1:3

    Answer: 12, 12 and 36
  5. 5. Statistics Mean

    Find the mean of: 4, 4, 11, 17, 20

    Answer: 11.2

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